Product Manual

9
Alternately: Rest the bottom of the hammer on the pin projecting inside the tube. Pull the knob on the Hammer Release
Spring Plunger* to release the hammer to drop.
* Read Hammer Drop Procedures on page 6 for more details on using the Hammer Release Spring Plunger.
What to do if the hammer is
dropped below the desired
height?
• If the control is set to determine the Peak impact value, this should not affect the Peak
Value reading because the undesirable drop will result in a low reading.
• If the control is set to determine the Average impact value, this will affect the average
impact value and another set of drops should be performed in a location adjacent to the
current location.
• If the operator is recording impact values for each individual drop, the undesirable drop
should be ignored.
What to do if the hammer is
dropped above the desired
height?
• If the control is set to determine either the Peak or the Average impact value, this will affect
the average impact value and another set of drops should be performed in a location
adjacent to the current location.
• If the operator is recording impact values for each individual drop, the undesirable drop
should be ignored.
What to do if the guide tube
shifts off a test site?
• If the hammer cannot be re-aligned with the test site, another set of drops should be
performed in a location adjacent to the current location.
What to do if the hammer
does not fall freely?
• If the control is set to determine the Peak impact value, this should not affect the Peak
Value reading since an undesirable drop will result in a low reading.
• If the control is set to determine the Average impact value, this will affect the average
impact value and another set of drops should be performed in a location adjacent to the
current location.
• If the operator is recording impact values for each individual drop, the undesirable drop
should be ignored.